*{
	margin: 0;
	padding: 0;
	list-style: none;
	text-decoration: none;
}
.header{
	font-size: 14px;
	border-bottom: 1px solid rgb(222, 218, 218);
}
.header .img-fluid {
	height: 23px;
}
.main .ma{
	height: 400px;
	text-align: right;
	background:url("../img/introduce.jpg");
	background-size:100% ;
	background-repeat: no-repeat;
}
p{
	font-size: 14px;
	font-family: "微软雅黑";
}
.foot{
	background: #f5f5f5;
	border-bottom: 1px solid rgb(222, 218, 218);
	border-top: 1px solid rgb(222, 218, 218);
}
.footer a{
	color: #333333;
	font-size: 14px;
}
@media (max-width:600px ) {
	.main .ma{
		height: 160px;
		text-align: center;
	}
	.header .nav-link{
		display: none;
	}
	.ma h1{
		padding-top: 170px;
	}
	.foot{
		padding-top: 200px;
	}
	.header button{
		display: none;
	}
	.san{
		text-align: center;
	}
	.si  .row button{
		display: none;
	}
}